Chlorin e6 Derivative Radachlorin Mainly Accumulates in Mitochondria, Lysosome and Endoplasmic Reticulum and Shows High Affinity toward Tumors in Nude Mice in Photodynamic Therapy. (17th April 2014)

• Record Type: Journal Article
• Authors: Biswas, Raktim; Moon, Jeong Hwan; Ahn, Jin‐Chul
• Is Part Of: Photochemistry and photobiology. Volume 90:Number 5(2014:Sep./Oct.)
• Page Start: 1108
• Page End: 1118
• Publication Date: 2014-04-17
• Subjects: Photochemistry -- Periodicals; Light -- Physiological effect -- Periodicals; 541.35
• DOI: 10.1111/php.12273
• Languages: English
• ISSNs: 0031-8655

Abstract

<abstract abstract-type="main" id="php12273-abs-0001"> <title>Abstract</title> <p>The efficacy of photodynamic therapy (PDT) depends upon the amount of photosensitizer accumulated in the malignant tissues. Radachlorin is a popular photosensitizer used in photodynamic therapy to treat various types of cancer. In this study, we have studied the main organelles responsible for the accumulation of radachlorin in human anaplastic thyroid cancer <italic>in vitro</italic> and <italic>in vivo</italic>. The optimal time window for uptake and clearance of radachlorin also was studied. Confocal microscopic images confirmed that the radachlorin is mainly acquired by mitochondria and partially by lysosome and endoplasmic reticulum. Studies also showed that the maximum amount of radachlorin was accumulated within 3–6 h after the treatment. Radachlorin also showed a higher affinity toward malignant tumors compared to the other organs in mice xenograft model. Uptake of radachlorin reached an optimum amount within 6 h and most of the radachlorins were also cleared from the body in next 48 h. Therefore, detailed information regarding exact accumulation sites and a time window in which maximum amount of drug is accumulated and cleared were obtained by this study. Hence, not only the efficacy of the treatment can be increased but the phototoxicity after the treatment also can be controlled.</p> </abstract>